French Alps in september: average Weather, Temperature and Climate, Where to go?
Weather in the French Alps in september 2025
In this section, check out the weather forecast for the month of september for most popular cities in Rhône-Alpes. These forecasts are statistics for september from weather reports for many years. The percentage indicates the probability of having the weather indicated.
Average weather in september in Grenoble (Isère)
good weather
Weather at 6am
56°F
Clear/Sunny
44% of time
20%
19%
10%
Weather at 12pm
63°F
Clear/Sunny
53% of time
24%
14%
5%
Weather at 6pm
54°F
Clear/Sunny
33% of time
24%
20%
13%
Weather at 3am
54°F
35%
26%
16%
14%
More information about the weather in Grenoble (Isère) in september
Where to go in the French Alps in september?
Where to go in the French Alps in september: destination map
perfect weather
good
tolerable
bad
very bad
Where to go in september based on the weather?
| Haute-Savoie (Annecy (Haute-Savoie), Chamonix, La Clusaz...) | 58°F to 72°F | 4 à 7 days | tolerable weather* |
| Hautes-Alpes (Gap (Hautes-Alpes), Briançon, Les Orres...) | 61°F to 77°F | 4 à 8 days | tolerable weather* |
| Isère (Grenoble (Isère), Alpe d'Huez, Charmant Som...) | 58°F to 67°F | 4 à 7 days | good weather* |
| Savoie (Chambéry, Aix-les-Bains, Val Thorens...) | 54°F to 74°F | 5 à 8 days | tolerable weather* |
Where should you go in the French Alps in september when it comes to the weather?
Remember:
The climate in the French Alps in september ranges from good to very bad depending on the region and city.
You are lucky: It is not ideal 100%, but the weather in Rhône-Alpes in september is pretty good averywhere: in Ardèche, Annecy (Haute-Savoie), Aix-les-Bains, Annonay, Thonon-les-Bains, Bourg-en-Bresse (Ain), Lyon, Savoy, Roanne, Chamonix, Saint-Etienne, Grenoble (Isère), Chambéry, Drôme and Montélimar. I allows to appreciate vacation in these areas. And even why not take a little time to enjoy the hotel pool!
Climate in the French Alps in september
Climate in Grenoble (Isère) in september
In september, maximum temperature is 67°F and minimum temperature is 54°F (for an average temperature of 61°F). The climate comfortable around this city in the month of september. With 4.5in over 5 days, rain may occur during your vacations. But this is pretty reasonably and it is only of temporary showers.
With a good climate, september is a good time to go there in Rhône-Alpes.
| September | |||
| Average temperature | 61°F | ||
| Highest temperature | 67°F | ||
| Lowest temperature | 54°F | ||
| Rainfall | 4.5in | ||
| Number of days with rainfall | 5 day(s) (18%) | ||
| Humidity | 89% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 33% | ||
| Length of day | 12:32 | ||
| Our opinion at whereandwhen.net | good |
Climate in Aix-les-Bains in september
In the month of september, the mean temperature in Aix-les-Bains is 63°F (maximum temperature is 74°F and minimum temperature is 52°F). The climate pleasant around this city in this month. With 3.9in over 6 days, rainfall can happen for your holidays. But this is pretty moderate and it is only of temporary showers.
With good weather conditions, september is a recommended month to go in Aix-les-Bains.
| September | |||
| Average temperature | 63°F | ||
| Highest temperature | 74°F | ||
| Lowest temperature | 52°F | ||
| Rainfall | 3.9in | ||
| Number of days with rainfall | 6 day(s) (19%) | ||
| Humidity | 89% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 30% | ||
| Length of day | 12:32 | ||
| Our opinion at whereandwhen.net | good |
Climate in Alpe d'Huez in september
In the month of september, the mean temperature in Alpe d'Huez is 52°F (maximum temperature is 58°F and minimum temperature is 47°F). The climate is quite fresh in this location in the month of september, but it is endurable by dressing hot. With 5in over 7 days, rain may occur for your vacations. But this is rather moderate and it will not be continuous.
With proper weather, the month of september is okay (but not the best time) for traveling in this locality in French Alps.
| September | |||
| Average temperature | 52°F | ||
| Highest temperature | 58°F | ||
| Lowest temperature | 47°F | ||
| Rainfall | 5in | ||
| Number of days with rainfall | 7 day(s) (23%) | ||
| Humidity | 87% | ||
| Daily sunshine hours | 11 | ||
| Cloud cover | 36% | ||
| Length of day | 12:32 | ||
| Our opinion at whereandwhen.net | tolerable |
Climate in Annecy (Haute-Savoie) in september
In the month of september, the mean temperature in Annecy (Haute-Savoie) is 61°F (maximum temperature is 72°F and minimum temperature is 50°F). The climate good there in this month. With 4.6in over 6 days, rain may occur for your holidays. But this is pretty reasonably and you will not be too bothered by it.
With good weather conditions, the month of september is a good month to go there.
| September | |||
| Average temperature | 61°F | ||
| Highest temperature | 72°F | ||
| Lowest temperature | 50°F | ||
| Rainfall | 4.6in | ||
| Number of days with rainfall | 6 day(s) (21%) | ||
| Humidity | 90% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 32% | ||
| Length of day | 12:33 | ||
| Our opinion at whereandwhen.net | good |
Climate in Chambéry in september
In the month of september, maximum temperature is 74°F and minimum temperature is 52°F (for an average temperature of 63°F). The climate quite good in this location in september. With 3.9in over 6 days, rain may occur throughout your trip. But this is reasonably and it will not be continuous.
With a good climate, september is a recommended month to go in that area in Rhône-Alpes.
| September | |||
| Average temperature | 63°F | ||
| Highest temperature | 74°F | ||
| Lowest temperature | 52°F | ||
| Rainfall | 3.9in | ||
| Number of days with rainfall | 6 day(s) (19%) | ||
| Humidity | 89% | ||
| Daily sunshine hours | 12 | ||
| Cloud cover | 30% | ||
| Length of day | 12:32 | ||
| Our opinion at whereandwhen.net | good |
All cities in the French Alps in september
| Grenoble (Isère) in september | good weather |
| Aix-les-Bains in september | good weather |
| Alpe d'Huez in september | tolerable weather |
| Annecy (Haute-Savoie) in september | good weather |
| Chambéry in september | good weather |
| Chamonix in september | very bad weather |
| La Clusaz in september | tolerable weather |
| La Plagne in september | bad weather |
| Les Menuires in september | tolerable weather |
| Savoy in september | bad weather |
| Tignes in september | very bad weather |
| Val Thorens in september | tolerable weather |
| Avoriaz in september | tolerable weather |
| Bonneval-sur-Arc in september | very bad weather |
| Briançon in september | tolerable weather |
| Gap (Hautes-Alpes) in september | tolerable weather |
| Bourget Lake (Lac du Bourget) in september | good weather |
| Les Orres in september | tolerable weather |
| Thonon-les-Bains in september | good weather |
| Aiguille du Midi in september | very bad weather |
| Aussois in september | tolerable weather |
Weather data for French Alps in september:
Weather data for French Alps in september is derived from an average of the weather forecast since 2009 in the French Alps. There is a margin of error and these forecasts are to be considered as general information only. The weather in the French Alps can vary slightly from year to year, but these predictions should limit surprises. So you can pack your bags and check when is the best time to go to the French Alps.